Jay Leno Says good-night to The Tonight Show. Take a look at a recap of the Top 5 Funniest Moments with Leno.

For more than 20 years, Leno has kept the ratings up for NBC's late-night television show by providing a broad stream of comedy and a safe haven for celebrity guests. Tonight, Leno passes the torch to Jimmy Fallon with faith that he'll carry on the show's legacy. After hosting more than 4,600 shows, Leno has had some memorable guests appear on the show and even more memorable moments.

Here are Metro's picks for the top five funniest moments on "The Tonight Show with Jay Leno":